Wright Tool 51011MM 10mm x 11mm Metric 12 Point Modified Offset Box Wrench. Equivalent to armstrong 53-634, proto J1053M, sk 55.10X11, williams BWM-1011
Features:
Patented Wright Drive� design distributes contact over a larger surface area for greater gripping power and strength.
Forged and Machined for Best Fit and Unyielding Strength
Easy to read stamp pattern in order to quickly determine opening size
Made in the USA. Designed, Engineered and Manufactured in Barberton, OH